mx2.fibramax.ec has no CNAME records.
Question and response
Question
dig mx2.fibramax.ec. NS
Answer
The response has no answer records.
Authority
fibramax.ec. 10800 SOA fibramax.ec. root.fibramax.ec. 73 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0